These tests were peformed by capturing NFS traffic with Wireshark and looking for the fsid major and minor numbers.
# tshark -T fields -e nfs.fsid4.major -e nfs.fsid4.minor port 2049
Errors and omissions excepted. All mistakes my own. If you don’t know what I’m talking about or why this would be useful to know then this post will not be very interesting.